Update CLI versions: Claude Code 2.1.66, Copilot CLI 0.0.421, MCP Gateway v0.1.8 by Copilot · Pull Request #19576 · github/gh-aw

Copilot · 2026-03-04T11:24:23Z

Update DefaultClaudeCodeVersion from 2.1.63 to 2.1.66 in pkg/constants/constants.go
Update DefaultCopilotVersion from 0.0.420 to 0.0.421 in pkg/constants/constants.go
Update DefaultMCPGatewayVersion from v0.1.7 to v0.1.8 in pkg/constants/constants.go
Run make recompile to update workflow lock files
Update WASM golden test files (TestWasmGolden_CompileFixtures) with new versions
Merge main into branch

Original prompt

This section details on the original issue you should resolve

<issue_title>[ca] Update CLI versions: Claude Code 2.1.66, Copilot CLI 0.0.421, MCP Gateway v0.1.8</issue_title>
<issue_description>### Summary

3 CLI/MCP updates detected and applied to pkg/constants/constants.go on 2026-03-04. make recompile completed successfully, updating 165 workflow lock files.

Tool	Previous	New	Risk
Claude Code	2.1.63	2.1.66	Low
Copilot CLI	0.0.420	0.0.421	Medium (integration test recommended)
MCP Gateway	v0.1.7	v0.1.8	Low

Update Claude Code 2.1.63 → 2.1.66

Version: 2.1.63 → 2.1.66 (intermediate: 2.1.64, 2.1.65, 2.1.66)

Release Timeline:

2.1.63: 2026-02-28
2.1.64: 2026-03-03
2.1.66: 2026-03-04

View Full Changelog

CLI Discovery

No changes detected in --help output between 2.1.63 and 2.1.66. All flags and subcommands are identical.

Breaking Changes

None detected.

Notes

Claude Code has no public GitHub repository. Version metadata sourced from NPM registry only. The help output between 2.1.63 and 2.1.66 is identical, suggesting internal bug fixes or performance improvements.

View Migration Guide

No migration steps required. Drop-in replacement.

Impact Assessment

Risk: Low
Affects: All Claude engine workflows
CLI interface: Unchanged

Package Links

NPM Package: https://www.npmjs.com/package/`@anthropic-ai/claude-code`

Update Copilot CLI 0.0.420 → 0.0.421

Version: 0.0.420 → 0.0.421

WARNING: Upgrading Copilot CLI requires a full integration test run to ensure compatibility.

View Full Changelog

CLI Discovery

One new flag detected in --help output:

New flag:

--plugin-dir (directory)    Load a plugin from a local directory (can
                            be used multiple times)
```

### Subcommand Changes
- `config` help: No changes
- `environment` help: No changes

### Breaking Changes
None detected.

### Model List (unchanged)
Available models in both 0.0.420 and 0.0.421:
- claude-sonnet-4.6, claude-sonnet-4.5, claude-haiku-4.5
- claude-opus-4.6, claude-opus-4.6-fast, claude-opus-4.5
- claude-sonnet-4, gemini-3-pro-preview
- gpt-5.3-codex, gpt-5.2-codex, gpt-5.2
- gpt-5.1-codex-max, gpt-5.1-codex, gpt-5.1, gpt-5.1-codex-mini
- gpt-5-mini, gpt-4.1

</details>

<details>
<summary><b>View Migration Guide</b></summary>

1. Run full integration test suite after deploying
2. New `--plugin-dir` flag is additive — no existing workflows affected

</details>

### Impact Assessment
- Risk: **Medium** (per project policy: Copilot upgrades require integration tests)
- Affects: All Copilot engine workflows
- New capability: `--plugin-dir` for loading local plugins

### Package Links
- NPM Package: https://www.npmjs.com/package/`@github/copilot`

---

### Update MCP Gateway v0.1.7 → v0.1.8

**Version**: v0.1.7 → v0.1.8

**Release Date**: 2026-03-04

<details>
<summary><b>View Full Changelog</b></summary>

### Release Highlights (from GitHub)

**Bug Fix**: HTTP backend session ID correctness — MCP Gateway now correctly uses the server-issued session ID when making `tools/list` calls to HTTP backends, rather than a client-generated ID. This resolves a subtle protocol compliance issue that could cause tool discovery to fail with HTTP-mode MCP servers.

### What's Changed
- fix: use server-issued session ID for HTTP backend tools/list by `@lpcox` in https://github.com/github/gh-aw-mcpg/pull/1559
- Add daily GHCR download tracker workflow by `@Copilot` in https://github.com/github/gh-aw-mcpg/pull/1560
- Improved test coverage for `server.setupSessionCallback`, `server.withResponseLogging`, and `config/validation_env` package
- Added debug logging to `writeGatewayConfig` for easier gateway startup diagnostics

### Docker Image
```
ghcr.io/github/gh-aw-mcpg:v0.1.8

View Migration Guide

No migration steps required. The session ID fix is transparent to existing workflows using HTTP-mode MCP servers.

Impact Assessment

Risk: Low
Affects: Workflows using MCP Gateway with HTTP-backend MCP servers
Fix: Improves protocol compliance for HTTP-mode MCP servers

Package Links

Release Notes: https://github.com/github/gh-aw-mcpg/releases/tag/v0.1.8

Recommendations

Claude Code: Low-risk update, deploy immediately
Copilot CLI: Run full integration test suite before deploying to production
MCP Gateway: Low-risk bug fix, deploy immediately

References:

§22664179808

Generated by CLI Version Checker · [◷](https://github.com/search?q=repo%3Agithub%2Fgh-aw+is%3Aissue+%22gh-aw-workflow-call-id%3A+github%2F...

Fixes [ca] Update CLI versions: Claude Code 2.1.66, Copilot CLI 0.0.421, MCP Gateway v0.1.8 #19568

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

✨ PR Review Safe Output Test - Run 22667873177

💥 [THE END] — Illustrated by Smoke Claude · ◷

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

…CP Gateway v0.1.8 Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

github-actions · 2026-03-04T11:44:02Z

❌ Tool validation failed! Agent Container Smoke Test detected missing tools: failed

github-actions · 2026-03-04T11:44:02Z

📰 BREAKING: Smoke Copilot is now investigating this pull request. Sources say the story is developing...

github-actions · 2026-03-04T11:44:04Z

🎬 THE END — Smoke Claude MISSION: ACCOMPLISHED! The hero saves the day! ✨

github-actions · 2026-03-04T11:44:10Z

🌑 The shadows whisper... Smoke Codex failed. The oracle requires further meditation...

github-actions · 2026-03-04T11:47:25Z

Commit pushed: 8ab2005

Generated by Changeset Generator

github-actions · 2026-03-04T11:49:37Z

🤖 Smoke test PR check — §22667873261

Test	Result
GitHub MCP	✅
GH CLI	✅
Serena MCP	❌
Playwright	✅
Web Fetch	✅
File Write	✅
Bash	✅
Discussion	✅
Build	✅
Workflow Dispatch	✅
PR Review	✅

Overall: ⚠️ PARTIAL PASS (Serena MCP not configured)

@pelikhan

📰 BREAKING: Report filed by Smoke Copilot · ◷

github-actions

Routine version bump PR. Removes continue-on-error: false (correct — this is the default and adding it explicitly is noise), bumps Copilot CLI 0.0.420→0.0.421, Claude Code 2.1.63→2.1.66, and MCP Gateway v0.1.7→v0.1.8. LGTM.

📰 BREAKING: Report filed by Smoke Copilot

.github/workflows/agent-performance-analyzer.lock.yml

github-actions · 2026-03-04T11:49:39Z

.github/workflows/agent-performance-analyzer.lock.yml

@@ -376,7 +374,7 @@ jobs:
            const determineAutomaticLockdown = require('/opt/gh-aw/actions/determine_automatic_lockdown.cjs');


MCP Gateway bumped from v0.1.7 → v0.1.8. Worth noting in release notes if this includes any breaking changes or new capabilities.

github-actions · 2026-03-04T11:50:03Z

📰 VERDICT: Smoke Copilot has concluded. All systems operational. This is a developing story. 🎤

pelikhan · 2026-03-04T11:52:44Z

@copilot fix build wasm and tests

https://github.com/github/gh-aw/actions/runs/22668011146/job/65704567733

github-actions · 2026-03-04T11:53:24Z

Smoke Test Results — Run §22667873177

Overall: PARTIAL (all non-skipped tests passed)

Core tests: ✅ #1 GitHub MCP · ✅ #2 GH CLI · ✅ #3 Serena · ✅ #4 Make build · ✅ #5 Playwright · ✅ #6 Tavily · ✅ #7 File write · ✅ #8 Bash · ✅ #9 Discussion · ✅ #10 AW MCP

PR review tests: ✅ #11 Update PR · ✅ #12 Review comments · ✅ #13 Submit review · ✅ #14 Resolve thread · ✅ #15 Add reviewer · ✅ #16 Push branch · ⚠️ #17 Close PR (skipped)

💥 [THE END] — Illustrated by Smoke Claude · ◷

github-actions

💥 Automated smoke test review - all systems nominal! This PR correctly updates three CLI versions (Claude Code 2.1.66, Copilot CLI 0.0.421, MCP Gateway v0.1.8) with appropriate risk assessment. The recompilation of 165 lock files looks clean.

💥 [THE END] — Illustrated by Smoke Claude

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2026-03-04T11:59:45Z

@copilot fix build wasm and tests

...

Fixed in 260d010 — updated the three WASM golden test files (basic-copilot, smoke-copilot, with-imports) to reflect the new Copilot CLI 0.0.421 and MCP Gateway v0.1.8 versions.

pelikhan · 2026-03-04T12:00:38Z

@copilot merge main

Copilot

Pull request overview

Updates default toolchain versions used by gh-aw workflows (Claude Code, GitHub Copilot CLI, and MCP Gateway) and regenerates derived lock/golden artifacts so compiled workflows reference the new versions.

Changes:

Bump default versions in pkg/constants/constants.go (Claude Code 2.1.66, Copilot CLI 0.0.421, MCP Gateway v0.1.8).
Regenerate workflow lock files to reflect updated install/image versions (and updated tool input schemas).
Update WASM compile-fixture golden outputs to match the regenerated workflows.

Reviewed changes

Copilot reviewed 101 out of 170 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pkg/constants/constants.go	Updates default CLI/MCP Gateway version constants used across workflow compilation/runtime.
pkg/workflow/testdata/wasm_golden/TestWasmGolden_CompileFixtures/with-imports.golden	Refreshes golden output to reflect Copilot CLI 0.0.421 and MCP Gateway v0.1.8.
pkg/workflow/testdata/wasm_golden/TestWasmGolden_CompileFixtures/smoke-copilot.golden	Refreshes golden output to reflect Copilot CLI 0.0.421 and MCP Gateway v0.1.8.
pkg/workflow/testdata/wasm_golden/TestWasmGolden_CompileFixtures/basic-copilot.golden	Refreshes golden output to reflect Copilot CLI 0.0.421 and MCP Gateway v0.1.8.
.github/workflows/weekly-safe-outputs-spec-review.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/video-analyzer.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/typist.lock.yml	Regenerated lock workflow to install Claude Code 2.1.66 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/test-workflow.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8.
.github/workflows/test-dispatcher.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/terminal-stylist.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/static-analysis-report.lock.yml	Regenerated lock workflow to install Claude Code 2.1.66 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/schema-consistency-checker.lock.yml	Regenerated lock workflow to install Claude Code 2.1.66 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/safe-output-health.lock.yml	Regenerated lock workflow to install Claude Code 2.1.66 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/research.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/repo-tree-map.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/repo-audit-analyzer.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/notion-issue-summary.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/metrics-collector.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8.
.github/workflows/lockfile-stats.lock.yml	Regenerated lock workflow to install Claude Code 2.1.66 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/go-fan.lock.yml	Regenerated lock workflow to install Claude Code 2.1.66 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/github-remote-mcp-auth-test.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/firewall.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8.
.github/workflows/example-workflow-analyzer.lock.yml	Regenerated lock workflow to install Claude Code 2.1.66 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/example-permissions-warning.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8.
.github/workflows/example-custom-error-patterns.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8.
.github/workflows/duplicate-code-detector.lock.yml	Regenerated lock workflow to use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/dev.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/daily-team-evolution-insights.lock.yml	Regenerated lock workflow to install Claude Code 2.1.66 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/daily-syntax-error-quality.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/daily-observability-report.lock.yml	Regenerated lock workflow to use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/daily-malicious-code-scan.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/daily-fact.lock.yml	Regenerated lock workflow to use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/daily-choice-test.lock.yml	Regenerated lock workflow to install Claude Code 2.1.66 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/commit-changes-analyzer.lock.yml	Regenerated lock workflow to install Claude Code 2.1.66 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/codex-github-remote-mcp-test.lock.yml	Regenerated lock workflow to use MCP Gateway v0.1.8.
.github/workflows/chroma-issue-indexer.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8.
.github/workflows/blog-auditor.lock.yml	Regenerated lock workflow to install Claude Code 2.1.66 and use MCP Gateway v0.1.8 (plus schema updates).
.github/workflows/artifacts-summary.lock.yml	Regenerated lock workflow to install Copilot CLI 0.0.421 and use MCP Gateway v0.1.8 (plus schema updates).
.changeset/patch-update-cli-versions-20260304.md	Adds a patch changeset documenting the default version bumps and rationale.

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Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot · 2026-03-04T12:06:47Z

@copilot merge main

Done in d9ff27b — merged main, resolved the lock file conflict, and recompiled.

github-actions · 2026-03-04T14:08:34Z

✅ All tools validated successfully! Agent Container Smoke Test confirms agent container is ready.

github-actions · 2026-03-04T14:11:37Z

Agent Container Tool Check

Tool	Status	Version
bash	✅	5.2.21
sh	✅	available
git	✅	2.53.0
jq	✅	1.7
yq	✅	4.52.4
curl	✅	8.5.0
gh	✅	2.87.3
node	✅	20.20.0
python3	✅	3.12.3
go	✅	1.24.13
java	✅	10.0.102
dotnet	✅	10.0.102

Result: 12/12 tools available ✅

Overall Status: PASS

🔧 Tool validation by Agent Container Smoke Test · ◷

Initial plan

29c3a72

Copilot AI assigned Copilot and pelikhan Mar 4, 2026

Copilot started work on behalf of pelikhan March 4, 2026 11:24 View session

Copilot AI and others added 2 commits March 4, 2026 11:27

chore: plan version updates

171d7b4

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

fix: update CLI versions - Claude Code 2.1.66, Copilot CLI 0.0.421, M…

cc1817c

…CP Gateway v0.1.8 Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Update CLI versions for Claude Code, Copilot CLI, and MCP Gateway~~ Update CLI versions: Claude Code 2.1.66, Copilot CLI 0.0.421, MCP Gateway v0.1.8 Mar 4, 2026

Copilot finished work on behalf of pelikhan March 4, 2026 11:36

pelikhan added the smoke label Mar 4, 2026

Add changeset [skip-ci]

8ab2005

ci: trigger checks

021a391

github-actions bot mentioned this pull request Mar 4, 2026

Smoke Test: Copilot - 22667873261 #19587

Closed

github-actions bot removed the smoke label Mar 4, 2026

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View reviewed changes

github-actions bot mentioned this pull request Mar 4, 2026

Smoke Test: Claude - 22667873177 #19590

Closed

github-actions bot added the smoke-claude label Mar 4, 2026

github-actions bot reviewed Mar 4, 2026

View reviewed changes

Copilot started work on behalf of pelikhan March 4, 2026 11:54 View session

fix: update wasm golden files for new CLI versions

260d010

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

pelikhan marked this pull request as ready for review March 4, 2026 11:59

Copilot AI review requested due to automatic review settings March 4, 2026 11:59

Copilot started reviewing on behalf of pelikhan March 4, 2026 12:00 View session

Copilot finished work on behalf of pelikhan March 4, 2026 12:01

Copilot started work on behalf of pelikhan March 4, 2026 12:01 View session

Copilot AI reviewed Mar 4, 2026

View reviewed changes

Merge branch 'main' into copilot/update-cli-versions

d9ff27b

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Copilot stopped work on behalf of pelikhan due to an error March 4, 2026 12:07
Failed to get response from the AI model; retried n times (total retry wait time: <duration>) Last error: Unknown error

Merge branch 'main' into copilot/update-cli-versions

dda18d2

pelikhan merged commit bd9c0ca into main Mar 4, 2026
43 checks passed

pelikhan deleted the copilot/update-cli-versions branch March 4, 2026 14:27

		@@ -376,7 +374,7 @@ jobs:
		const determineAutomaticLockdown = require('/opt/gh-aw/actions/determine_automatic_lockdown.cjs');

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Update Claude Code 2.1.63 → 2.1.66

CLI Discovery

Breaking Changes

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Impact Assessment

Package Links

Update Copilot CLI 0.0.420 → 0.0.421

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Smoke Test Results — Run §22667873177

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